I just installed my AVG Internet Security 2018, and everything is working the way it should. The only thing that is annoying is at the bottom of the AVG console page the block trying to sell you more AVG products, it pops up with "Your PC is cluttered and slowed down by performance issues" ! I've tried different things, but its still there! HELP! 
Hello Tom,
I understand that you keep receiving AVG campaign pop-ups. Please do not worry, we do have an option to stop this pop-ups. Open AVG Internet Security->Menu->Settings->General->Uncheck the option "Show campaign pop-ups for other AVG products".
If you still receive any pop-up, please send us the screenshot http://avgclick.me/getscreenshot of the same, we will check the pop-up and assist you further.
TOM, If applicable… For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
AVG Guru
Hello Tom,
I understand that you keep receiving AVG campaign pop-ups. Please do not worry, we do have an option to stop this pop-ups. Open AVG Internet Security->Menu->Settings->General->Uncheck the option "Show campaign pop-ups for other AVG products".
If you still receive any pop-up, please send us the screenshot http://avgclick.me/getscreenshot of the same, we will check the pop-up and assist you further.